To cite package ‘GWnnegPCA’ in publications use:

Tsutsumida N (2026). GWnnegPCA: Geographically Weighted Non-Negative Principal Components Analysis. R package version 0.0.6, https://github.com/naru-t/gwnnegpca.

Corresponding BibTeX entry:

  @Manual{,
    title = {GWnnegPCA: Geographically Weighted Non-Negative Principal
      Components Analysis},
    author = {Narumasa Tsutsumida},
    year = {2026},
    note = {R package version 0.0.6},
    url = {https://github.com/naru-t/gwnnegpca},
  }